package operation;

import book.Book;
import book.BookList;

import java.util.Scanner;

public class DelOPeration implements IOperation{
    @Override
    public void work(BookList bookList) {
        System.out.println("删除图书！");
        Scanner scanner = new Scanner(System.in);
        System.out.println("请输入要删除的图书的名称：");
        String name = scanner.nextLine();
        int currentSize = bookList.getUserSize();
        int del = -1;
        int i = 0;
        for (; i < currentSize; i++) {
            Book book = bookList.getBook(i);
            if(book.getName().equals(name)){
                del = currentSize;
                break;
            }
        }
        if (i == currentSize){
        System.out.println("没有你要删除的图书！！");
        return;
    }
        for (int j = del;j<currentSize-1;j++){
            //[j] = [j+1];
            Book book = bookList.getBook(j+1);
            bookList.setBooks(j,book);
        }
        bookList.setBooks(currentSize-1,null);
        bookList.setUserSize(currentSize-1);
    }
}
